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ArticlesThree for Speed


October 1997 / Reviews / Three for Speed

A trio of loaded, high-megahertz PowerPC 603e-based systems offer great performance at low prices.

Tom Thompson

The pace at which processor speeds increase continues its relentless advance. Today, systems based on the low-cost PowerPC 603e are available at the peppy speeds of 280 and 300 MHz. Furthermore, three vendors, Umax, Motorola, and -- surprise! -- Apple, offer Mac OS systems in the $2500-to-$3000 price range.

These are not bare-bones boxes. The systems (Umax's SuperMac C600/280, Motorola's StarMax 5000/300, and Apple's Power Mac 6500) have at least 32 MB of RAM, a fast CD-ROM drive, 16-bit stereo sound, and a hard drive that's 3 GB or larger. Some offer dual monit or support, a 10Base-T Ethernet interface or a 33.6-Kbps modem, and an Iomega Zip drive. All come with lots of bundled software.

System Overview

All three systems come in a mini-tower design and achieve their low price in several ways. The most obvious is the PowerPC 603e's low cost, as well as low RAM prices. All three also use an internal Enhanced IDE (EIDE) hard drive rather than a higher-priced SCSI drive.

The SuperMac C600 and Power Mac 6500 use a set of ASICs (code-named Alchemy) that are based on Apple's Performa 6000 series and target the cost-sensitive SOHO market. However, flaws in system design contribute to a hardware/software glitch in System 7.6.1 that disables the L2 cache, hammering system performance. But this and other difficulties have been resolved through patches or workarounds.

The Motorola StarMax 5000 series uses the Tanzania II main logic board, which was jointly developed by Apple and Motor ola. This architecture is a lightweight Common Hardware Reference Platform (CHRP), which uses some mainstream PC parts to reduce system costs.

All three systems use PCI slots for hardware expansion. Depending on the vendor, the number of PCI slots varies from as few as two to as many as five. PCs typically stuff one expansion slot with a SCSI connector card, another with a Sound Blaster card, and perhaps a third with a graphics accelerator. On a Mac OS system, however, 16-bit stereo sound, a SCSI connector, and accelerated video are integral to the system. Thus, the dearth of slots on these Mac OS systems isn't as bad as it might appear to a PC user. In a last vestige of Apple's go-its-own-way mentality, the Performa 6500 design sports a proprietary communications slot, which may or may not be occupied with a fax/modem card.

Software compatibility among these systems was excellent. In my tests, using Microsoft Office; Adobe Photoshop, Acrobat, and Illustrator; Netscape's Communicator; Qualcomm's E udora Light Internet E-mail program; and a slew of utilities, I encountered no problems. All my favorite extensions and Control Panels worked as well, such as NOW Utilities and Adobe Type Manager (ATM).

At these systems' clock rates, typical operations, such as image editing in Photoshop, flew by quickly. Playback of video CDs through Apple's software QuickTime MPEG decoder was smooth and reliable.

Apple Power Mac 6500

This system has a 300-MHz 603e proces-sor, a 50-MHz system bus, and 512 KB of L2 cache clocked at 50 MHz. Its 64 MB of RAM is expandable to 128 MB. For storage, it has a 4-GB hard drive, a 12X SCSI CD-ROM drive, and a 100-MB Iomega Zip drive. The communications slot has a 33.6-Kbps Express modem. The built-in video uses the ATI 3D Rage II+ graphics-acceleration chip.

The Power Mac 6500's other expansion features seem rather sparse, particularly since it's the most expensive of the three systems. It doesn't include an Ethern et interface or a second display board. It also sports the fewest PCI slots (two). However, adding a PCI expansion card is a snap: You undo three screws, pull on two tabs, and drag out the drawer that houses the slots. Then you simply plug in the card and slide the drawer back into the system.

Umax SuperMac C600/280

This system has the slowest processor speed of the three, at 280 MHz. The processor sits on a plug-in board, which allows for future upgrades. The 280-MHz speed is partially offset by a 1-MB in-line cache that's clocked at 80 MHz, twice the system-bus speed. This also means that the SuperMac's system bus is the slowest of the trio, running at 40 MHz. In terms of BYTEmark performance, the SuperMac C600 placed last in integer computations, but it actually edged out the faster systems on floating-point computations.

At $2395, it comes loaded with a 12X CD-ROM drive, a 4-GB hard drive, 32 MB of RAM (expandable to 144 MB), an Asante 10Base-T Ethernet card, a s econd display board with accelerated 2-D and 3-D graphics for dual-monitor support, and a 33.6-Kbps Global Village fax/modem card in the communications slot. It also has a slew of extras, such as a pair of miniature stereo speakers and a JABRA Ear Phone for use with the telephony functions.

To add a PCI card to the SuperMac, you must first loosen some screws, slide the case off, and remove a support strut. I managed to figure this out without consulting a manual, but the process could be daunting for some people. MPEG playback of the video CD didn't work, but a quick download of a patch from the SuperMac Web site solved the problem. The system doesn't come with a Zip drive, but there are plenty of bays for one.

Motorola StarMax 5000/300

On the outside, this box looks almost as smart as the Apple unit. There's a lot to like on the inside, too: a 300-MHz 603e processor, 512 KB of L2 cache (expandable to 1 MB) on a 50-MHz bus, 32 MB of RAM (expandable to 160 MB), ATI 3D Rage II+ accelerated graphics for the built-in video, a 16X CD-ROM drive, a 4.3-GB hard drive, 10Base-T Ethernet, an IMS Twin Turbo graphics card for dual-monitor support, and an internal 100-MB Zip drive -- all for a price of $2899.

While the StarMax placed last in both the BYTEmark integer and floating-point calculations, the difference among the three systems was so small that it was unnoticeable. With the unit's Ethernet interface, accelerated graphics, and large hard drive, I found myself using it a lot.

The one dark side to the StarMax is adding a PCI card. Of the three systems, this was the hardest to do this on. I had to consult the manual to figure it out. And the procedure involves some disassembly -- again, a bad thing for the average user.

A Close Race

Of the three systems, I prefer the StarMax because it's well built and about as fast as the other two. The mix of extras, such as the Ethernet interface, Zip drive, and second display card, make it attractive. Plus, it has no problems with MPEG playback. In addition, the Tanzania II design means that you can use a spare PC mouse and keyboard on the system.

The SuperMac C600 places a close second, with nearly the same goodies and a price of just under $2400. Despite its good performance, the Power Mac's high price and lack of a second display and Ethernet interface means I can't recommend it over the Motorola and Umax systems.


Product Information


Apple Power Mac 6500..................$3000

Apple Computer, Inc.
Cupertino, CA
Phone:    408-996-1010
Fax:      800-505-0171
Internet: 
http://www.apple.com/

Enter 1084 on Inquiry Card.
Information on 
this product
 and similar products (operating systems)

Motorola StarMax 5000/300.............$2899

Motorola Computer Group
Tempe, AZ
Phone:    512-434-1526
Fax:      602-438-4636
Internet: 
http://www.mot.com/computer/starmax/

Enter 1082 on Inquiry Card.
Information on 
this product
 and similar products (operating systems)

Umax SuperMac C600/280................$2395

Umax Computer Corp.
Fremont, CA
Phone:    510-226-6886
Fax:      510-623-7350
Internet: 
http://www.supermac.com

Enter 1083 on Inquiry Card.
Information on 
this product
 and similar products (operating systems)


Information on products in the operating systems category HotBYTEs - information on products covered or advertised in BYTE

Apple Power Mac 6500 Ratings

Techno logy * * * *  
Implementation * * *    
Performance * * * * *
Key: ***** Outstanding, **** Very Good, *** Good, ** Fair, * Poor

Motorola Starmax Ratings

Technology * * * * *
Implementation * * * *  
Performance * * * *  
Key: ***** Outstanding, **** Very Good, *** Good, ** Fair, * Poor

Umax Supermac Ratings

Technolo gy * * * * *
Implementation * * * *  
Performance * * * * *
Key: ***** Outstanding, **** Very Good, *** Good, ** Fair, * Poor

BYTEmark Indexes

illustration_link (15 Kbytes)


Apple Power Mac 6500

photo_link (23 Kbytes)


Motorola StarMax

photo_link (23 Kbytes)

BYTE Best.


Umax SuperMac

photo_link (23 Kbytes)


Tom Thompson is a BYTE senior technical editor at large. You can reach him by sending e-mail to tom_thompson@bix.com .

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